Ebay twin turbo setup Checklist...Turbo a SBM for under $1000? :)

Discussion in 'Forced Induction Mopar' started by Caco2120, Jul 27, 2017.

  1. Caco2120

    Caco2120 Well-Known Member

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    SO here I sit, with a mid 70's, low compression 318. 60K miles...and a desire to turbo something! And yes this includes some ricer math and bench racing, so don't beat me up too bad.

    So I keep coming across all these ebay turbo's and china (yes I'm sorry) ebay components that make this seem fairly do-able, and cheap ta-boot.

    So is it worth it? well I figure a strong SB from BP or ATK would run me at a minimum $4000, and make almost 375 hp, and around 460 ft lbs.

    So for $900-1000 in hard parts, and another $1500 in a fitech or sniper setup...I'd have $2500 in probably the same 375 HP, and 460 ft lb engine....which is enough to have fun with IMO for a street/strip car. probably run 13's in an A-body, maybe even high 12's.

    So here's the list...from ebay.

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    • Caco2120

      Caco2120 Well-Known Member

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      I'll break this up into a few posts so its not overbearing.

      here's the plan.

      2- twin t3/t4 hybrids ran into a single 2into-1 intercooler. then plumbed back to a carb hat, Sitting atop a Sniper or Fitech.

      So add one of these to the above, and compatible pump/distributor, and boom.... Well hopefully not "boom" but vroom...lol

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    • Caco2120

      Caco2120 Well-Known Member

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      Pace Gives us a nice little discount of you deal with Johnny Directly, so call the above $1600
      Super Stores - Mopar SB/BB Superstore

      so 1600, plus 900 of ebay glory...and Bingo, $2500

      now I realize i'll have to cut and re-weld mopar flanges on the headers above. and some other odds and ends like downpipes...but this is not too far off of a complete setup.
       
    • Caco2120

      Caco2120 Well-Known Member

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      The math:

      So a mid 70's 318 make all of what? 160 HP...? 260 ish ft lbs?

      @ 10 PSI

      I have always heard to double your HP, you need 14 PSI, because that's atmospheric pressure, so you're adding another atmosphere.

      so @ 10PSI...I wouldn't quite double it, so be at maybe 300? tops.

      I think it would live there, being low compression, and not a insane amount of boost. plus efi control, and adequate fuel flow...

      So there you have it. My winter project. Any objections, refinements, laughs? lol love to hear opinions
       
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      • Johnny Mac

        Johnny Mac www.blueprintengines.com FABO Vendor

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        • ValiantOne

          ValiantOne Well-Known Member

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          I'll be watchin' if you do it. Sounds cool to me!
           
        • BigBlockMopar

          BigBlockMopar BigBlockMember

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          You forgot to add another $4k for the 2nd engine, when (not if) the first one blows that is.
           
        • rumblefish360

          rumblefish360 so close yet so far away

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          Super cheap turbo?

          Military intelligence

          A government that doesn't lie

          Checks In the mail

          I promise not to in your mouth

          There really is a Santa Claus and Easter bunny

          Not only is the girl on the internet really is skinny, huge chested and beautiful, but she really does desire you!
           
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          • Johnny Mac

            Johnny Mac www.blueprintengines.com FABO Vendor

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            no faith! lol....that engine has what? 7:1 compression... i think it'll live through at least 8 psi!
             
          • rumblefish360

            rumblefish360 so close yet so far away

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            But not the shredded turbo bits that get shoved into it.
             
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            • Johnny Mac

              Johnny Mac www.blueprintengines.com FABO Vendor

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              lol ok. i see what this thread needs...a poll!
              What blows first?

              we have one vote for the 40 year old engine
              another for the offshore turbo
              I think it'll live, china turbo's and all for quite a while.
               
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              • rumblefish360

                rumblefish360 so close yet so far away

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                Sorry for being pessimistic but I've seen several self destruct. Now if it was a quality turbo ......
                 
              • BigBlockMopar

                BigBlockMopar BigBlockMember

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                The first reason it might blow early is because EFI will be involved.
                A few too optimistic values in a small number of ignition or fuel table cells can seal the engine's destiny quicker one would hope for.

                ;)
                 
              • Jerry G

                Jerry G SandFreaks

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                I really like were your going with this and have thought allot about it also.
                But being a lowly stock 318 I would shoot for more around 5 to 8lbs of boost with a single Turbo and see how she likes it. Ive seen it done succesfully in completely stock 1600cc VW air cooled motors.
                Big difference of course but the overall theory is the same.
                (taking small cc's and cramming as much air and fuel in it as it can take)
                Twin Turbos with 10lbs of boost is to much for a stock 318.
                At least it will be once you feel that turbo kick in and your right foot cant stay still.......
                Good luck and keep us all posted.
                 
              • Caco2120

                Caco2120 Well-Known Member

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                I'm pretty confident a self learning EFI system adds to the success possibility, not detracts. the power adders even have laptop software, and so does the holley.
                small twins with 2 wastegates set at 8-10 psi, and a large blowoff should help...Yeah I could buy a blow through carb, but that won't have the adjustability and won't control timing.

                If it grenades...then o man, where will I find another junkyard 318 with 60k miles on it.????
                 
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                • AJ/FormS

                  AJ/FormS 367 FormS clone 3.09-1.92-1.40-1.09-.78od 3.55s

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                  60,000 is just nicely broke in, just put a new double roller chain on it. Sneak up on the boost while you sneak down on the tune.
                  But above all take those turbos apart and rebuild 'em before you bolt 'em on. China doesn't charge extra for the debris they ship along inside of them. That's hearsay btw.
                  There's only a couple of things worse than two piled up turbos spewing their guts into your intake, after you spent every last dollar you saved up for the last three years.
                  And there are only a few things better than 450 hp, and I think 450ftlbs at stall could be one of them. Then the next one would be when you finally figure out how to make it hook.
                  450# at 3000 thru a 2.45 low and 3.55s would be about 3900 ftlbs to the axles. Hyup, I know exactly what that feels like; Hang on everybody!, and pray it goes straight! lol. Actually it's not that exiting but you get the idea. 6000# to the axles, now yer talking! Crazy-talking.

                  But I was in your shoes about 20 years ago. And I knew I could never afford to do it twice, so I went with tried and true Normally Aspirated,hi-compression 360. I took the engine out and apart 5 or 6 winters in a row, looking for chit. And three of those winters, sure enough chit was happening. But every time I caught it in time and it was a cheap repair. I bought reuseable gaskets on day one, so it only cost me time.At that time the body was fresh outta the bodyshop, and if the engine hadda gone down, the back-up winter-teener wouldda had to be the full-time engine.
                  But I gotta tell you one thing I learned. For a streeter; gears are everything. That stock long-block 318 could be nearly as much fun as that hi-powered 360; all it took was gears.
                  It's a lil different tho with a DD or multi-purpose car. If the engine has to pull past 65mph, then a lack of power quickly shows up. And buzzing along the freeway in the 3000s is also not fun.
                  But for a city-car a stock long block teener, with a 4bbl,headers, a 2800TC, and the right gears can be an awful lotta fun. Make mine a TQ. And make sure it spins at least 5000 without pumping up the lifters. 3.55s and 4000 will get you about 35 in low, and 60 in second.
                  But the most fun I had was with 4.30s. 5000 was 36 in Low,61 in 2nd, and 90 wound up tight in D. Hyup that was fun. If it wasn't any faster, I didn't care; cuz it sure sounded faster.
                   
                  Last edited: Jul 27, 2017
                • magnumdust

                  magnumdust Well-Known Member

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                  Even though it is self learning, I'd pay a little at the dyno. Or learn the software and tune with a wideband on the street.

                  My car has a self tuning system(I'm betting more primitive than the one you're ordering). It works well, but I wouldn't trust it to self tune forced induction.

                  Otherwise, Good luck! I want to see results and the eventual piston pin through the block.
                   
                • 318willrun

                  318willrun Stomper 4x4... we kept energizer in business

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                  150 net. 230 gross. People do this all the time. they quote one motor in gross (your 375 hp motor example), and then use the net on the teen.
                   
                • Caco2120

                  Caco2120 Well-Known Member

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                  I don't get the difference in both ratings. If I strap it to an engine dyno, it makes XXX....that's what I call crank HP...Is that synonymous with "gross"? is "net" RWHP?

                  so my lightly used teener makes 230 "crank"?...so 400 at 10 psi...even more run.lol
                   
                • Caco2120

                  Caco2120 Well-Known Member

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                  I plan on data logging, and the fitech and sniper both have wideband / afr displays.
                   
                  Last edited: Jul 28, 2017
                • subcom

                  subcom Well-Known Member

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                  Mine is built with a lot of EBay stuff; turbo, wastegate, BOV, misc fittings. It adds up but still not as much as a crate engine. Biggest headache is all of the piping, but that's mostly lots of time, not money. Go for it!
                   
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                  • Scott's dart

                    Scott's dart Well-Known Member

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                    Hey did anything come of this? Is it in a different thread or just never got updated?
                     
                  • Johnny Mac

                    Johnny Mac www.blueprintengines.com FABO Vendor

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                    He intrigued me enough to try it myself. I will do a Thread regardless. i don't want to threadjack.
                    20180316_122823.jpg
                     
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                    • abodyjoe

                      abodyjoe Well-Known Member

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                      I’d love to do a turbo set up. I have no idea where I’d even start though.
                       
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                      • Johnny Mac

                        Johnny Mac www.blueprintengines.com FABO Vendor

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                        you're to blame for my ebay spending.lol that 20% coupon code you sent out!!

                        I'm on board with much of the thought process above. 8psi probably won't kill the engine...The efi should help with logging, preventing lean outs. I'm thinking the clutches in the 904 let loose before the pistons do.

                        guess we will see this summer. Worst case scenario.... i know a place that sells engines :p